As far as I know, all of the ubnt gear with gigabit ports will take any poe polarity... As long as there's a pair with negative and a pair with positive, they'll turn on. I don't see that ubnt adding a second negative pair will really affect anything, unless netonix did that as well.
On Tue, May 8, 2018, 11:53 AM Adam Moffett <dmmoff...@gmail.com> wrote: > If that's right, would that mean 0.5amp on 4&5 and 0.25amp on 3&6,7&8 ? > Is it a 0.5amp fuse? > > > ------ Original Message ------ > From: "Jeremy" <jeremysmi...@gmail.com> > To: af@afmug.com > Sent: 5/8/2018 11:42:35 AM > Subject: Re: [AFMUG] crowdsource troubleshooting > > No, that is not true, it adds an additional ground on 3&6. So to obtain a > gigabit connection you have + on 4&5 and - on 3&6, 7&8. All of the present > day UBNT gear is like this since they added gigabit Ethernet. When we > upgrade we add a jumper to 3&6 to get it to negotiate at gigabit, but they > seem to operate at 100FDX without it. > > On Tue, May 8, 2018 at 9:30 AM, Jacob Turner <ja...@happycycling.com> > wrote: > >> The Prism Gen 2 uses "standard" UBNT passive 24v POE. +4,5 -7,8. I've >> seen netonix switches claiming as much as 12 watts draw from one when >> running. I wouldn't be surprised if their startup draw may be a bit higher. >> >> On Tue, May 8, 2018 at 8:16 AM, <ch...@wbmfg.com> wrote: >> >>> I need help in understanding a product failure. >>> >>> I have now had two customers with similar failures in my POE fuse >>> product. The fuses are blowing. >>> So far it is limited to the fuses on pins 4/5. >>> >>> One customer is using: >>> UBNT 5AC Prism Gen 2 radio, Mikrotik 411 boards, using both poes and >>> netonix as the power supply. >>> >>> What pins and polarities does that radio use for POE? How much current? >>> >>> I may need higher rated fuses or slower fuses. But I can only go so >>> high before it is not protecting Netonix thus becoming an expensive CAT5 >>> splice. >>> >>> My ideas so far: >>> >>> I need a slower reacting fuse. >>> >>> I need a higher amp rating fuse. (not sure how high I can go and still >>> protect Netonix) >>> >>> Some loads have unanticipated currents on those wires. >>> >>> Plugging in when powered may cause a connection sequence problem where >>> if pin 4 makes contact first the whole load will go through that wire and >>> blow that fuse. >>> >>> >> >> >
